520436540513 has 2 divisors, whose sum is σ = 520436540514. Its totient is φ = 520436540512.

The previous prime is 520436540497. The next prime is 520436540597. The reversal of 520436540513 is 315045634025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502557641569 + 17878898944 = 708913^2 + 133712^2 .

It is a cyclic number.

It is not a de Polignac number, because 520436540513 - 2⁴ = 520436540497 is a prime.

It is a super-2 number, since 2×520436540513² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (520436545513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260218270256 + 260218270257.

It is an arithmetic number, because the mean of its divisors is an integer number (260218270257).

Almost surely, 2^520436540513 is an apocalyptic number.

It is an amenable number.

520436540513 is a deficient number, since it is larger than the sum of its proper divisors (1).

520436540513 is an equidigital number, since it uses as much as digits as its factorization.

520436540513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 38.

The spelling of 520436540513 in words is "five hundred twenty billion, four hundred thirty-six million, five hundred forty thousand, five hundred thirteen".